|
VIPER Solid Dielectric, Three Phase Reclosers Fault
Interrupting through 38kV, 800A, 12.5kA symmetrical
interrupting.
G&W Viper solid dielectric, three phase reclosers
combine the time proven reliability of electronically
controlled, vacuum fault interrupters with the maintenance
benefits of a solid dielectric insulated device. The
reclosers are designed for three phase automatic or
manual trip operation providing overcurrent protection
for systems rated up to 38kV maximum, 800A continuous,
and 12.5kA rms symmetrical interrupting. The units
can also be used for sectionalizing and automatic
transfer schemes.
 |
Features |
 |
Latest Solid Dielectric
Technology - Solid dielectric Viper
reclosers utilize G&W’s time proven EPOX polymer
system to fully encapsulate the vacuum interrupters.
This system provides excellent insulation properties
while providing fully shielded, void-free construction.
All modules are UV protected and 100% factory tested
for partial discharge. Dual ratio current transformers
are encapsulated within each module providing either
500:1 or 1000:1 protection characteristics. CT ratios
can be changed in the field.
Operator Safety - Vacuum interrupters
are sealed within a solid dielectric insulation. A hookstick
operable manual trip and lockout handle is clearly visible
and easily operated from the ground. The lockout handle
prohibits operation either from the control or remotely
if part of an automation scheme. An open and closed
contact indicators show the vacuum interrupter’s contact
position. Contact status and lockout condition can also
be verified on the control.
Maintenance-free
- Solid dielectric insulation provides a maintenance-free
installation. The magnetic actuator and interface electronics
are located in a separate compartment at the bottom
of the recloser for easy access, if required.
Compact, lightweight - The solid dielectric Viper weighs
considerably less than comparably rated oil insulated
devices. No special lifting equipment is required.
Latest Technology Magnetic Actuator - Viper reclosers
utilize the latest in magnetic actuator technology.
This highly efficient actuator consumes very little
energy. The actuator offers superior, repeatable performance
with few moving parts.
Reliable
Performance - The interrupter and magnetic
actuator assembly have been tested for over 10,000 mechanical
operations to assure a long operating life.
Control Flexibility - Viper reclosers are designed to
work directly with the popular, field proven Schweitzer?
SEL-351R control. Other controls are available depending
on application requirements. the manual open handle
also disables any local or remote closing operation
until the handle is reset. Once reset, the recloser
can be closed using the control.
|
Operation
Options |
|
Dead-line Operation
- A dead-line operation option permits using the batteries
located in the control for operation of the recloser
if AC input power is lost.
Remote status of power supply condition - This optional
feature reports the operational status of the interrupter
power supply.
|
MANUAL
TRIP OPERATION |
|
For manual open and lockout operation, a handle is provided
permitting hookstick operation. Pulling the handle down
trips and locks out the recloser. A contact position
indicator is provided indicating open or closed status
of the main contacts. The contact status is also displayed
at the recloser control. Operation of the manual open
handle also disables any local or remote closing operation
until the handle is reset. Once reset, the recloser
can be closed using the control. CONTROL CAPABILITIES
|
MANUAL
TRIP OPERATION |
|
Various style controls are available depending upon
application requirements. Typical control settings include:
- Minimum trip for phase, ground and sensitive ground
faults.
- Numerous preprogrammed and user-defined time current
curves for sensing phase or ground faults.
- Three independent recloser interval times. Capable
of up to four shots to lockout.
- Reset time.
- Sequence coordination.
- Cold load pickup.
- Advanced parameters. Refer to control
- specifications information for more details.
|
CONTROL
CONNECTIONS |
|
Threaded style connectors make cable connection between
control and recloser extremely easy. The connector design
is the same as other style reclosers permitting easy
changeout of previously installed controls and/or reclosers.
|
SECTIONALIZING
APPLICATIONS |
|
Viper solid dielectric reclosers can be programmed to
provide an ideal solution for sectionalizer applications.
|
DISTRIBUTED
AUTOMATIC TRANSFER APPLICATIONS |
|
Viper solid dielectric reclosers can also be programmed
to provide an ideal solution for overhead applications
requiring distributed automatic transfer switching.
The magnetic actuator permits extremely fast open transfer
in under 8 cycles.
|
DISTRIBUTION
AUTOMATION |
|
roper control selection, applied with the Viper recloser,
provides great flexibility for automated sectionalizing
schemes and other control algorithms. Consult your G&W
representative to discuss specific applications
|
PADMOUNT
APPLICATIONS |
|
For applications where space is limited at the substation
or where underground feeders require protection, Viper
solid dielectric reclosers can provide an ideal solution
using a standard, dead-front padmount design. In this
configuration, the cable connections can be provided
with either a standard IEEE 600A apparatus or 200A deepwell
interface for elbow connectors.
|
BUSHINGS |
|
600A bushing interface with removeable silicone insulators
are standard for overhead applications (photo page 2).
Higher BIL rated insulators can be used in high pollution
areas and can be retrofitted if necessary. 600A apparatus
and 200A deepwell bushings available for padmount applications.
Ratings
| Maximum Design Voltage,
kV |
15.5 |
27 |
38 |
|
Impulse level (BIL), kV |
110 |
125 |
150 |
|
Continuous & loadbreak
current, A |
800 |
800 |
800 |
|
8-hour Overload, A rms |
940 |
940 |
940 |
| One minute (dry) ( 50/60Hz Withstand, kV rms) |
50 |
60 |
70 |
| 10 second (wet) ( 50/60Hz Withstand, kV rms) |
45 |
50 |
60 |
| Radio Influence Voltage,
microvolts 100 @ |
9.4kV |
16.4kV |
23kV |
|
Interrupting Current,
kA rms sym. |
12.5 |
12.5 |
12.5 |
|
Making Current, kA asym.
rms |
20 |
20 |
20 |
|
Making Current, kA asym.
peak |
32 |
32 |
32 |
|
Short Circuit Current,
kA sym., 3 second |
12.5 |
12.5 |
12.5 |
|
Mechanical endurance,
operations |
10,000 |
10,000 |
10,000 |
|
.gif){kind=small}
